Skip to content

Which of the following… (Class 12 Chemistry 2026, Q2)

questionbuddy.in/q/cbse-12-chemistry-2026-56-1-1-q2-solutions-lowest-freezing-point-water

ChemistryCBSE Class 12 · Board exam 2026, set 56/1/1 · 1 mark · MCQ

CBSE Class 12 Chemistry 2026: question 2

Set in the CBSE Class 12 board exam of 2026, paper 56/1/1, section A, question 2, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q2 · 1 mark · MCQSolutions

Which of the following solutions will have the lowest freezing point in water ?

  1. (A)0.1 M Glucose
  2. (B)0.1 M
  3. (C)0.1 M KCl
  4. (D)0.1 M Urea

Source: official question paper from cbse.gov.in (PDF). See it in the full 2026 board paper, set 56/1/1.

Hints

Open one hint at a time and try again before the next.

Hint 1

Freezing point depression is a colligative property.

Hint 2

Count the ions each solute gives in water.

Step-by-step solution

Each step shows the marks it earns, as an examiner would award them. Checked by an independent re-solve from the question paper.

  1. . At equal concentration, the solute with the largest van't Hoff factor gives the largest depression.

  2. Values of : glucose 1, urea 1, KCl 2, 3. So 0.1 M has the lowest freezing point: option (B).

    1 mark

Answer: Option (B) 0.1 M CaCl₂

Where the marks are

  • Uses the highest to choose (1 mark)

Revise the chapter

Practise this chapterBoard-style questions from Solutions, one at a time, marked against the answer key and marking points.Back to the full paper2026 board paper, set 56/1/1: every question, by section.

The question is transcribed from the official paper; figures are described in words. The solution, hints and chapter tag are ours. Spotted an error? Write tosupport@questionbuddy.in.